Chromium

Chromium is an open-source Web Browser project that aims to build a safer, faster, and more stable way for all users to experience the web. This is based on the Chrome browser. Chromium should work anywhere that the Chrome browser will work. One difference between Chromium browser and the Chrome browser is that the Chromium version will not auto update. Pre-built versions can be found on the Internet.

Chromium OS is an open-source project that aims to provide a fast, simple, and more secure computing experience for people who spend most of their time on the web. This is based on the Chrome OS. Generally you would build this from scratch using available C and C++ sources however, there are some unofficial pre-built versions available. To build Chromium OS you will need.

The Web browser and therefore a part of Chromium OS is a HTML transfer protocol called SPDY (pronounced SPeeDY) which compresses and streamlines the transfer of data. See SPDY whitepaper and Wikipedia for more details. Note that this is being replaced by HTTP/2.